6.8.4 SignalsTable 73:STBPTOC Input signalsName Type Default DescriptionI3P GROUPSIGNAL- Three phase group signal for current inputsBLOCK BOOLEAN 0 Block of functionRELEASE BOOLEAN 0 Release of stub protectionTable 74:STBPTOC Output signalsName Type DescriptionTRIP BOOLEAN General trip signalSTART BOOLEAN General start signal6.8.5 SettingsTable 75:STBPTOC Group settings (basic)Name Values (Range) Unit Step Default DescriptionOperation OffOn- - Off Operation Off / OnI> 1 - 2500 %IB 1 200 Operate current level in % of IBaseTable 76:STBPTOC Non group settings (basic)Name Values (Range) Unit Step Default DescriptionGlobalBaseSel 1 - 6 - 1 1 Selection of one of the Global Base Valuegroups6.8.6 Monitored dataTable 77:STBPTOC Monitored dataName Type Values (Range) Unit DescriptionIL1 REAL - A Current in phase L1IL2 REAL - A Current in phase L2IL3 REAL - A Current in phase L36.8.7 Operation principleThe sampled analog phase currents are pre-processed in a discrete Fourier filter (DFT)block. From the fundamental frequency components of each phase current the RMSvalue of each phase current is derived. These phase current values are fed to a1MRK 511 287-UEN A Section 6Current protection135Technical manual
